Method and device for treating desulfurized waste water

A technology of desulfurization wastewater and treatment method, which is applied in gaseous discharge wastewater treatment, multi-stage water treatment, water/sewage multi-stage treatment, etc., can solve the problem of ineffective utilization of wastewater resources, low added value of sodium chloride, and no economy efficiency and other issues, to achieve the effect of saving pharmaceutical costs, reducing steam consumption, and improving utilization

Inactive Publication Date: 2018-09-21
BEIJING NOVEL ENVIRONMENTAL PROTECTION +1
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Problems solved by technology

The softening treatment process of this process needs to consume a lot of chemical costs, the treatment cost is high, and the price of sodium chloride and sodium sulfate is low, so there is not much economic benefit
[0006] Among the above methods, the first two methods can meet the discharge standards, but

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  • Method and device for treating desulfurized waste water
  • Method and device for treating desulfurized waste water
  • Method and device for treating desulfurized waste water

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Embodiment Construction

[0042]The specific embodiments are only an illustration of the present invention, and do not constitute a limitation to the content of the present invention. The following will further illustrate and describe the present invention in conjunction with specific embodiments.

[0043] According to one aspect of the present invention, a kind of desulfurization wastewater treatment method is provided, comprising the following steps:

[0044] (1) The pretreated desulfurization waste water enters the first MVR evaporative crystallizer; the feed liquid in the first MVR evaporative crystallizer reaches a certain concentration and then enters the first insulation settler; the saturated calcium sulfate precipitated in the first MVR Realize solid-liquid separation in a heat preservation settler; wherein, the calcium sulfate slurry at the bottom of the first heat preservation settler is discharged into the feed container of the filter press, and the calcium sulfate solid is obtained through ...

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Abstract

The invention relates to the field of industrial waste water treatment, in particular to a method and device for treating desulfurized waste water. The combined process treatment method of pretreatment, two-stage MVR evaporative crystallization, single-effect evaporation and spray drying is adopted, water, calcium sulfate, magnesium sulfate monohydrate and sodium chloride in the desulfurized wastewater are separated and recycled, the utilization rate of the waste water is increased, multiple products can be obtained, and recycling of resources is achieved.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a desulfurization wastewater treatment method and device. Background technique [0002] At present, the technical routes of desulfurization wastewater treatment mainly include chemical precipitation method, flue gas evaporation method, chemical softening + evaporation crystallization method. [0003] Chemical precipitation is currently the most commonly used desulfurization wastewater treatment process, commonly known as the triple box process, which mainly removes pollutants such as heavy metals and suspended solids in desulfurization wastewater through neutralization, precipitation, flocculation and other processes. Wastewater Cl after adopting this method to treat - High concentrations are likely to cause secondary pollution. The sludge and sludge produced by this process have not been effectively treated, resulting in pollution transfer. [0004] The flue gas...

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Application Information

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IPC IPC(8): C02F9/10C01F11/46C01F5/40C01D3/04C02F103/18
CPCC01D3/04C01F5/40C01F11/46C02F1/001C02F1/04C02F1/38C02F9/00C02F2001/007C02F2103/18C02F2301/08
Inventor 李伟赵长龙甘文鸿张泽亚
Owner BEIJING NOVEL ENVIRONMENTAL PROTECTION
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